Can congo tetras live with paradise fish?

Verdict
Yes

Yes. Congo tetras and paradise fish make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 Paradise fishParadise fish61–79°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Congo tetra 73–82°Paradise fish 61–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Congo tetra 6–7.5Paradise fish 6–8
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 inParadise fish · 3.5 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Congo tetraParadise fish
Temperature73–82 °F61–79 °F
pH6–7.56–8
Adult size3.0 in3.5 in
Minimum tank30 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleTop
GroupGroups of 6+One per tank
DietOmnivoreOmnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for paradise fish

All paradise fish tank mates

Questions

Can congo tetras live with paradise fish?

Yes. Congo tetras and paradise fish make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both congo tetras and paradise fish?

73–79 °F. Congo tetras need 73–82 °F, paradise fish need 61–79 °F.

What size tank do congo tetras and paradise fish need together?

At least 30 gal, set by the congo tetra. Add space for each extra fish.